president obama spoke about them in today's memorial service in boston. here's some of the sights and sounds from that service. ♪ >> today, our prayers are with the campbell family of medford, their daughter krystle was always smiling. those who knew her said that with her red hair and her freckles and her ever eager willingness to speak her mind, she was beautiful, sometimes she could be a little noisy, and everybody loved her for it. our prayers are with the lu family of china, who sent their daughter lingzi to b.u. so she could experience all that this city has to offer. she was a 23-year-old student far from home and in the heartache of her family and friends on both sides of a great ocean, we're reminded of the humanity that we all share. our prayers are with the richard family of dorchester and our hearts are broken for 8-year-old martin, with his big smile and bright eyes. and we're left with two enduring images of this little boy. forever smiling for his beloved bruins, and forever expressing a wish he made on a blue poster board. no more hurtin